AD5251 Analog Devices, AD5251 Datasheet - Page 18

• Manufacturer Part Number: AD5251
• Description: (AD5251 / AD5252) Dual 64-and 256-Position I2C Nonvolatile Memory Digital Potentiometers
• Manufacturer: Analog Devices

AD5251/AD5252
–100
100
–20
–40
–60
–80
80
60
40
20
–12
–18
–24
–30
–36
–42
–48
–54
–60
0
–12
–18
–24
–30
–36
–42
–48
–54
–60
–6
–6
Figure 28. AD5252 Gain vs. Frequency vs. Code, R
Figure 27. AD5252 Gain vs. Frequency vs. Code, R
0
0
0
10
10
32
Figure 29. AD5252 ∆R
100
100
64
100k Ω
0x02
1k Ω
1k
1k
96
CODE (Decimal)
FREQUENCY (Hz)
0xFF
0x80
0x10
0x80
0x40
0x10
0x04
0x02
0x01
FREQUENCY (Hz)
0x40
0x20
0x08
0x20
0x08
0x04
0x01
0x00
128
10k
10k
AB
10k Ω
vs. Code, T
160
100k
100k
50k Ω
192
A
= 25°C
V
0xFF
DD
AB
1M
AB
224
1M
= 5.5V
= 100 kΩ
= 50 kΩ
0x00
256
10M
10M
Rev. 0 | Page 18 of 28
1.2
1.0
0.8
0.6
0.4
0.2
0
DIGITAL FEEDTHROUGH
Figure 31. Clock Feedthrough and Midscale Transition Glitch
1
Figure 30. Supply Current vs. Digital Input Clock Frequency
MIDSCALE
PRESET
10
MIDSCALE
PRESET
100
Figure 32 .t
CLOCK FREQUENCY (Hz)
1k
RESTORE RDAC1
SETTING TO 0x3F
VDD = VA1 = VA3 = 3.3V
GND = VB1 = VB3
RESTORE RDAC3
SETTING TO 0x3F
EEMEM_RESTORE
10k
V
T
DD
A
100k
V
= 25°C
= 5.5V
DD
= 2.7V
1M
CLK
VDD = 5V
V
VDD
(NO DE-
COUPLING
CAPS)
VWB1
(0x3F
STORED
IN EEMEM)
VWB3
(0x3F
STORED
IN EEMEM)
W
10M